Affordability, ease of maintenance and performance are the main characteristics of the JF-17
You should put China in your equation and you'll get a positive answer to your inquiries.
So the potential is still huge, from Africa to Asia to South America, not talking about Brazil? But Argentina and potentially others.
The fleets of most developing nations are not composed of F-5s alone, I mentioner in the category of F-5, meaning the MIGs too.
The 4000 replacements I have mentioned are the global estimates, so even if we take out let's say 1500 out that belong to somehow richer countries who can afford other more expensive planes, the potential is still for 2500 replacements, if we add 400 for China, that makes it a total of almost 3000 replacements that can be filled by the JF-17 in time. if orders start pouring in, China will certainly invest in production facilities and thus enhance the production capacity .